{
//{}加上大括号可以使超出16位的进行转义
  console.log('a',`\u0061`);
  console.log('s',`\u20BB7`);
  console.log('s',`\u{20BB7}`);

}

{
  console.log(String.fromCharCode("0x20bb7"));
  console.log(String.fromCodePoint("0x20bb7"));
}

{
  //改字符串的重复次数
  let str="abc";
  console.log(str.repeat(2));
}

//自动补充
{
  console.log('1'.padStart(3,'0'));
  console.log('1'.padEnd(3,'0'));
}

{
  let user={
    name:'list',
    info:'hello world'
  };
  console.log("========"+abc`i am ${user.name},${user.info}`);

  function abc(s,v1,v2){
  	 console.log(s);
    console.log(s,v1,v2);
    return s+v1+v2
  }
}